Scully ST-15 single point overfill prevention controllers interface with 2-wire optic, thermistor truck-mounted sensors, or top-loading portable canes. They are mounted at a loading rack or fill station for connection to a single compartment tank vehicle. The ST-15 provides the vehicle with an adequate static ground path to the rack provided the vehicle overfill equipment is wired and maintained to factory speciation's. It connects to the vehicle via Scully plug and cable assembly or cane sensor.
Note: The Scully ST-15 is an intrinsically safe system. For maximum safety, it should be used only in conjunction with sensors manufactured by Scully not to jeopardize the conditions of the approvals.
Features
- Maximum safety with Dynacheck® automatic and continuous self-checking circuitry
- Will not permit loading under any fault or wet sensor conditions
- Signals for automatic shut-off of product flow within a half-second of detecting an overfill condition
- Ideal overfill prevention for refuelers, rail tank cars, tank trucks, chemical trailers and other one compartment vehicles
- 30 years of proven, dependable performance
- Easy connection to vehicles with versatile high impact plug and cable units
- Explosion-proof, weather tight
- Lockable bypass switch
- Approved by Factory Mutual, CSA, Class I, Zone 1 Group IIB
Specifications
- Part Number: 07677
- Model: ST-15-115-ELK
- Power Requirements: 105 - 130 V AC, 50/60 Hz, 20 Watt max.
- Thermistor Sensors (FM & CSA Approved): SP-BL, SP-BLU, SP-BLH two-wire Optic Sensors SP-TO, SP-TOM, SP-IO, SP-IR, SP-TO(SS), SP-TO(SS)HP
- Enclosures: Explosion-proof, weathertight. Corrosion inhibiting epoxy paint optional
- Indicator Lamps: Red = Power On/Non-Permit Green = Permit
- Turn on response time: 6 - 30 seconds (typical) for thermistors - Two-wire optics turn on instantly
- Shutdown Response Time: 0.5 seconds maximum
- Connections: Provided by internal terminal strips
- Output Control: One normally open volt free contact, rated 250 V AC, 5A resistive, energized when the sensor is dry
- Output Control Fuse: Internal 5 Amperes
- Approvals: XP-AIS /I/1/CD/T6 Ta = -40°C to 60°C; Entity - 61654; XP-AIS/I/1/IIB/T6 Ta = -40°C to 60°C; Entity 61654 Class I Zone 1 Group IIB
- Weight: 28 lbs. (12.7 kg)
